ODs Faktasider. Brønnbane / Leting. Generell informasjon. Brønnbane navn 17/4-1 EXPLORATION. Faktakart i nytt vindu. lenke

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1 Generell informasjon Brønnbane navn 17/4-1 Type Formål Status Faktakart i nytt vindu Hovedområde EXPLORATION WILDCAT P&A lenke NORTH SEA Brønn navn 17/4-1 Seismisk lokalisering LINE 5836 SP. C1325. Boret i utvinningstillatelse 007 Boreoperatør Boretillatelse 14-L Boreinnretning Bore dager 71 Elf Petroleum Norge AS OCEAN VIKING Borestart Boreslutt Frigitt dato Publiseringsdato Opprinnelig formål Gjenåpnet Innhold Funnbrønnbane Avstand, boredekk - midlere havflate Vanndybde ved midlere havflate WILDCAT NO DRY NO Totalt målt dybde (MD) [m RKB] Temperatur ved bunn av brønnbanen [ C] Eldste penetrerte alder Eldste penetrerte formasjon Geodetisk datum NS grader ØV grader 98 EARLY PERMIAN ROTLIEGEND GP ED ' 54'' N 3 16' 5'' E NS UTM ØV UTM UTM sone 31 NPDID for brønnbanen 153 Side 1 av 6

2 Brønnhistorie General Well 17/4-1 was drilled on a NNE-SSW trending monocline in the Ling Depression between the Sele High and the Utsira High /Patch Bank ridge. The objective was to investigate the sedimentary section down to the pre-permian, and particularly to test the hydrocarbon potential of the Mesozoic sands and Zechstein dolomites. Furthermore, Early Permian and/or pre-permian reservoirs were to be evaluated if present. Operations and results Wildcat well 17/4-1 was spudded with the semi-submersible installation Ocean Viking on 15 June 1968 and drilled to TD at 3997 m in conglomerate in the Early Permian Rotliegend Group. Initial drilling to 444 m was with seawater, and the returns were to the sea floor. The 17 1/2" hole was drilled out using an LFC-LC/sea water type mud, and the 13 3/8" casing shoe was set at 1803 m. From this depth the mud system was salt saturated. The 12 1/4" hole was drilled down to 3942 m from where the hole diameter was reduced to 8 1/2". An inverted oil-base mud was used from 2900 m to TD. Sandstones were encountered in the Jurassic and Triassic. They had medium to good porosities, but generally poor permeabilities due to calcite cement. The pre-zechstein conglomerate was very tight with no porosity. On top of this there were nearly 1200 m of evaporites, apparently undisturbed by halokinesis. The evaporites were overlain by around 300 m of continental Triassic deposits. The Jurassic consisted of fluvial sandstones overlain by carbonaceous dark shales belonging to the Late Jurassic "hot" shale (Draupne Formation). This shale was penetrated at 2122 m and is 95 m thick in the well position. No samples of any kind was recovered from this interval, but analysis of caved cuttings believed to originate from Draupne indicated TOC in the range 2 % to 7 % with potential for oil and gas. The Draupne ion is immature in the well. The Early Cretaceous marine, low energy shales range in age from Hauterivian to Albian, and they reflect deposition in a subsiding basin. There were approximately 280 m of Late Cretaceous carbonates which were deposited in an open marine environment. Deposition of lime muds probably terminated at the end of the Cretaceous, and the Tertiary is mostly represented by low energy marine sediments. A shoaling of the water in Neogene time resulted in shallow marine conditions where both sand and clay were deposited. Minor gas shows were recorded while drilling the Tertiary section and the Late Jurassic Draupne Formation. Two conventional cores were cut. The first in the interval 2271 m to 2288 m in the Vestland Group, and the second in the interval m to 3884 m in the Rotliegend Group. No fluid sample was taken. The well was permanently abandoned as dry on 22 August Testing No drill stem test was performed Borekaks i OD Borekaksprøve, topp dybde Borekaksprøve, bunn dybde Side 2 av 6

3 Borekaksprøve tilgjengelig NO Borekjerner i OD Kjerneprøve nummer Kjerneprøve - topp dybde Kjerneprøve - bunn Kjerneprøve dybde dybde - enhet [m ] [m ] Total kjerneprøve lengde 19.5 Kjerneprøve tilgjengelig YES Palynolgiske preparater i OD Prøve dybde Dybde enhet Prøve type Laboratorie C OD C OD C OD C OD C OD C OD C OD C OD C OD C OD C OD C OD Litostratigrafi Top depth Lithostrat. unit 132 NORDLAND GP 544 HORDALAND GP 1041 ROGALAND GP 1041 BALDER FM 1080 SELE FM 1108 LISTA FM 1150 VÅLE FM 1163 SHETLAND GP Side 3 av 6

4 1163 TOR FM 1370 HOD FM 1408 BLODØKS FM 1438 HIDRA FM 1444 CROMER KNOLL GP 1444 RØDBY FM 1706 ÅSGARD FM 2080 MIME FM 2122 VIKING GP 2122 DRAUPNE FM 2217 HEATHER FM 2265 VESTLAND GP 2352 NO GROUP DEFINED 2352 SKAGERRAK FM 2532 SMITH BANK FM 2665 ZECHSTEIN GP 2665 UNDIFFERENTIATED 3829 KUPFERSCHIEFER FM 3834 ROTLIEGEND GP Spleisede logger navn 153 pdf 0.42 Geokjemisk informasjon navn 153_1_Etyde_geochimique_complementaire_ well_17_4_1 153_2_Rapport_concernant_une_etude_geoch imique_17_4_1 153_3_Preliminary_results_of_petroleum_geo chemical_studies_of_the_17_4_1 well PDF 2.18 pdf pdf _4 pdf 0.40 er - eldre OD WDSS rapporter og andre relaterte dokumenter Side 4 av 6

5 navn 153_01_WDSS_General_Inion pdf 0.20 er - rapportert av utvinningstillatelsen (frigitt ihht til regelverk) navn 153_10_Survey_report pdf _11_Etude_des_mineraux_argileux_et_ma jeurs 153_12_Etude_micropaleontologique_cretace_ inferieur-jura 153_13_Completion_Report_&_Completion_lo g pdf 7.15 pdf 1.11 pdf _1_Completion_Report_&_Completion_log pdf _2_Drilling_summary pdf _3_Bore_card_fiche_stratigraphique pdf _4_Preliminary_results_of_petroleum_geo chemical_studies 153_6_Rapport_concernant_une_geochemiqu e_complementaire_su pdf 1.12 pdf _7_Rapport_d_implatation pdf _8_Rapport_de_fine_de_sondage pdf _5_Programme_du_forage pdf _9_Resultats_de_analyse_dun_enchantillo n pdf 7.35 er - OD publikasjoner navn 153_01_NPD_Paper_No.14_Lithology Well_1 7_4_1 153_02_NPD_Paper_No.14_Interpreted_Lithol ogy_log Well_17_4_1 pdf pdf Logger Type logg Topp dyp Bunn dyp for for logg logg CDM CDM CDM Side 5 av 6

6 CST 0 0 FDC FDC FDC GR IES IES IL LL MLL ML SL BHC GR SNP Foringinsrør og formasjonsstyrketester Type utforing Utforing diam. [tommer] Utforing dybde Brønnbane diam. [tommer] Brønnbane dyp Slam egenvekt ekvivalent [g/cm3] Type formasjonstest CONDUCTOR LOT INTERM LOT INTERM. 13 3/ / LOT OPEN HOLE / LOT Boreslam Dybde Egenvekt, Viskositet, Flytegrense Type slam MD slam [g/cm3] slam [mpa.s] [Pa] seawater waterbased waterbased waterbased waterbased waterbased Dato, måling Side 6 av 6